Bed-motion for printing-presses.



PATENTED DEC. 13, 1904.

G. P. FBNNER.

BED MOTION FOR PRINTING PRESSES.

APPLIOATION FILED MAY 14, 1904.

3 SHEETS-SHBET 14 N() MODEL.

` INVENTUR myenner WC Afm/f ATTORNEY wnNEssEs No. 777,337. PATENTED BEC. 13, 1904. G. P. MNNER.

BED MOTION POR PRINTNG PRESSES.

APPLICATION FILED MAY 14, 1904.

N0 MODEL. SSEEETS-SHEET 2 WITNESSES: viNVlNTOR ATTORNEY No. 777,337. PATENTED DEG. 13, 1904. G. P. FENNER. BED MUTION FOB. PRINTING PRESSES.

APPLIOATIONTILIJD MAY 14, 1904-.

NO MODEL.

3 SHEETS-SHEET 3.

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wnNEssEs: /Vf INVENTOR f @wn-9e Znnfr ATTORNEY NITED STATES Patented December 13, 1904.

GEORGE P. FENNER, OF NEV LONDON, CONNECTICUT.

BE D-NIOTION FOR PRINTING-PRESSES.

SPECIFICATION forming part of Letters Patent No. 777,337, dated. December 13, 1904.

Application filed May 14, 1904. Serial No. 207,973. (No model.)

To L7/Z 7,072,077?, it 771,077/ 0072.037177.:

Be it known that I, Geenen P. FnNNnn, a citizen ofthe United States, residing at New Lond on, county of New London, Connecticut, have invented new and useful Improvements in Bed- Motions for Printing-Presses, Stel, of which the following is a specification.

This invention relates to an improvement in mangle-gear bed-motion.

Accordingl to this invention a sphere is applied at the end of the rack to be engaged by a gear during the process of stopping and starting such rack.

As made heretofore the gear has engaged a straight roll, or in some modified cases the gear has engaged an oval roll. Generally the straight roll was used. The spherical roll gives a perfect bearing between the space in the gear and the roll. When using' a straight roll, because of the Obliquity of the shaft the space in the gear which engages the straight roll bears at a point which is difficult to make satisfactorily. When the roll on the end of the rack isnmade oval and the space in the gear made straight, as has been done, the same small contact between the gear and the roll results. Neither of these is a perfect mechanism.

This invention is set forth in the following specification and. claims and illustrated in the annexed drawings, in which- Figure l is a side elevation of a printingpress embodying this invention. Fig. 2 is an end view of Fig. l. Fig. 3 is a side elevation of a mangle-gear midway between its upper and lower position. Fig. 4 is a section along .fr m, Fig. 3. Fig. 5 is aview like Fig. 4 with parts in a diiferent position than in Fig. 4E. Fig. 6 is a sectional view of the gear and a sphere.

In the drawings are shown a rack (t and gear The gear or its shaft chas a vertical or reciprocating'motion inthe arm or slot part ai. The curve or guide a at the end or reverse point of the rack is engaged by the gear or a pin or stud i thereon when moving from one side to another of the rack. The operation of these parts is known.

The sphere or spherical roll f at the end of the rack on stud g is engaged by the gear or while there is a change of parts the result is the saine. With the spherical when the gear is in the position shown in Fig. 3 the sphere is moved endwise on the pin, as seen by comparing Fig. 3 or Fig. 4 with Fig. 5. In passing from one side of the gear to the other the sphere is taken from its position next to the rack, moving out toward the end of the pin, and carried back again to its original position in every case. The spring on the pin insures the roll staying at the point where the gear leaves it, so that it will bein the correct position to be engaged bythe gear at the next revolution.

In case the rollerf' should become displaced or be removed or slid out of position while the gear is in engagement with an intermediate part of the rack the spring z, will return the roller or move it back to the rack or to position for the gear or the space of the gear to properly reengage the roll.

The space in the gear, as seen in the drawings, is of spherical or hollowed shape to conform to the sphere.

What I 'claim as my invention, and desire to secure by Letters Patent, isn

l. A mangio-gear movement comprising a gear portion and .a rack and sphere for engagement by the gear, said gear having a spherical recess corresponding' to the sphere, so that uniform or perfect bearing is maintained between the parts during reverse.

Q. A mangio-gear movement comprising a rack a sphere at the end of the rack and a gear made to engagethe sphere during stopping and starting of the rack, said gear having a seat or recess corresponding to the sphere to maintain perfect contact.

3. A mangle-gear movement comprising a rack and sphere and a gear havingaspherical IOO space corresponding t0 the sphere to make uniform or perfect engagem ent 1n various positions as the gear tilts or inclines during reversing.

5 4. A becl-clrivinggear with a hemispherical space and a rack having at each end a spherical roll to engage the said space in the gear, the spherical roll constructed to move end- Wise on its bearing during its Contact with the I0 gear.

5. A gear combined with a rack and spherical roll and a Spring t0 hold the spherical roll in its proper position to be engaged by the gear.

In testimony whereof I have hereunto set I 5 my hand in the presence of two subscribing Witnesses.

GEORGE P. FENNER.

Witnesses:

MAURICE E. SHERMAN, A. A. SMITH. 

